A gas boiler flue gas treatment device

Abstract

The present application belongs to the technical field of flue gas treatment device, and relates to a flue gas treatment device for gas boiler. The present application comprises a box, one side of the box is provided with an inlet pipe, the other side is provided with an outlet pipe, a heat exchange assembly is arranged in the box, one end of the heat exchange assembly is connected with a return pipe, and the other end is connected with an inlet pipe; the heat exchange assembly comprises a plurality of heat exchange shells arranged at intervals, adjacent heat exchange shells are communicated through first connecting pipes; a cleaning roller for cleaning the heat exchange shells is arranged in the box, a sliding frame is arranged in the box and slides forward and backward, a sliding rod is arranged in the sliding frame and elastically moves left and right, and one end of the cleaning roller is connected with the sliding rod; a concave-convex plate is fixedly installed in the box. The cleaning roller moves forward and backward along the outer surface of the heat exchange shell and reciprocally moves left and right, so as to clean the heat exchange shell. Meanwhile, the cleaning roller rotates, so that different parts of the cleaning roller contact with the heat exchange shell, and the cleaning effect on the heat exchange shell is ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of flue gas treatment devices, and relates to a flue gas treatment device for a gas-fired boiler. BACKGROUND

[0002] A gas-fired boiler is a device that uses natural gas, liquefied petroleum gas or other gaseous fuel for combustion to generate heat. In order to save resources and improve the utilization efficiency of the gas-fired boiler, people often recover heat from high-temperature flue gas generated by the gas-fired boiler to heat water.

[0003] For example, a gas-fired steam boiler flue gas exhaust heat deep recycling device is disclosed in a patent document with the authorization announcement No. CN210198148U, which comprises a shell, the shell is provided with an inlet and an outlet, a splitter plate is arranged in the shell, the splitter plate is connected with a water pipe, a circulating mechanism is arranged on the shell, a communication cavity is formed in the splitter plate, the water pipe penetrates into the communication cavity, an annular cavity is also formed in the splitter plate, and the splitter plate is in communication with the annular cavity. In the device, water in the water pipe is continuously circulated through the circulating mechanism, so that the water flow passes through the heat collecting pipe multiple times to increase the heat absorption distance of the water flow and improve the heat absorption efficiency. The annular array distribution of the heat collecting pipe allows the cold water to absorb heat more uniformly, and the heat absorption speed is improved with the help of the heat collecting wire. However, the device has the following disadvantages in actual use: a large amount of dust particles are contained in the flue gas, which enters the shell along with the flue gas and adheres to the heat collecting pipe and the heat collecting wire, thereby affecting the heat absorption efficiency of the heat collecting pipe.

[0004] To solve the above problems, the application provides a flue gas treatment device for a gas-fired boiler. SUMMARY

[0005] To solve the problems in the background art, the application provides a flue gas treatment device for a gas-fired boiler.

[0006] To achieve the above-mentioned purposes, the application adopts the following technical solutions:

[0007] The flue gas treatment device for the gas-fired boiler comprises a box body, an inlet pipe is arranged on one side of the box body, an outlet pipe is arranged on the other side of the box body, a heat exchange assembly is arranged in the box body, one end of the heat exchange assembly is connected with a return water pipe, and the other end of the heat exchange assembly is connected with an inlet pipe; the heat exchange assembly comprises a plurality of heat exchange shells arranged at intervals, and the adjacent heat exchange shells are communicated through first connecting pipes; a cleaning roller for cleaning the heat exchange shells is arranged in the box body, a sliding frame is arranged in the box body and slides forward and backward, a sliding rod is arranged in the sliding frame and elastically moves left and right, one end of the cleaning roller is connected with the sliding rod, and the other end of the cleaning roller is connected with the sliding frame and slides; a concave-convex plate is fixedly installed in the box body, and the sliding rod cooperates with the concave-convex plate; the sliding frame drives the cleaning roller to move along the forward and backward direction and the cleaning roller reciprocally moves left and right.

[0008] Further, the cleaning roller is rotatably installed on the sliding frame; a rotating piece is rotatably installed on the sliding frame, the cleaning roller is limitingly and slidably connected with the rotating piece, a gear is fixedly installed on the rotating piece, and a rack is fixedly installed in the box body and engaged with the gear.

[0009] Further, the smoke outlet pipe is connected with a spray tank, the spray tank is provided with a smoke discharging box in communication with the spray tank, and the smoke discharging box is provided with a smoke discharging assembly.

[0010] Further, the upper portion of the spray tank is provided with a spray plate, a plurality of spray holes are formed in the spray plate, the spray plate and the inner wall of the upper portion of the spray tank enclose a second water storage cavity, and the water in the second water storage cavity is sprayed into the spray tank through the spray plate to remove dust and cool the smoke in the spray tank.

[0011] Further, the lower portion of the spray tank is fixedly provided with a partition plate, the partition plate and the inner wall of the lower portion of the spray tank enclose a first water storage cavity, and a water outlet is formed in the partition plate.

[0012] Further, the bottom of the spray tank is fixedly provided with a water pump, the first water storage cavity is in communication with the water inlet end of the water pump, the water outlet end of the water pump is connected with a second connecting pipe, and the second connecting pipe is in communication with the second water storage cavity.

[0013] Further, the smoke discharging assembly comprises a first motor and a fan blade, the first motor is fixedly installed on the smoke discharging box, and the output shaft of the first motor extends into the smoke discharging box and is fixedly connected with the fan blade.

[0014] Further, a lead screw is rotatably arranged in the box body, the sliding frame is threadedly connected with the lead screw, a guide rod is fixedly installed in the box body, and the sliding frame is slidably connected with the guide rod.

[0015] Further, the rotating piece comprises a cylindrical segment and a square segment, and the cylindrical segment and the square segment are fixedly connected; the cylindrical segment is rotatably connected with the sliding frame, the sliding shaft is provided with a square hole matched with the square segment, and the square segment is slidably arranged in the square hole.

[0016] Compared with the prior art, the present application has the following beneficial effects: 1. The cleaning roller moves back and forth along the outer surface of the heat exchange shell while moving left and right, thereby cleaning the heat exchange shell. Meanwhile, the rotation of the cleaning roller enables different parts of the cleaning roller to contact the heat exchange shell, thereby ensuring the cleaning effect on the heat exchange shell.

[0017] 2. When the smoke passes through the spray tank and is discharged, the water sprayed through the spray holes removes dust and cools the smoke in the spray tank, thereby reducing the influence of the smoke on the environment. The water in the second water storage cavity can be repeatedly used through the communication between the first water storage cavity and the second water storage cavity, thereby saving water resources.

[0018] 3、The spray plate is conical, which increases the time of flue gas passing through the spray plate, and is beneficial to fully dust removal and cooling of the flue gas. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present application;

[0020] Figure 2 is a vertical sectional view of the box body in the present application;

[0021] Figure 3 is a schematic diagram of the internal structure of the box body in the present application;

[0022] Figure 4 is a horizontal sectional view in the present application;

[0023] Figure 5 is an enlarged view of A of the present application; Figure 4

[0024] Figure 6 is an enlarged view of B of the present application; Figure 4

[0025] Figure 7 is a schematic diagram of the heat exchange assembly in the present application;

[0026] Figure 8 is a schematic diagram of the sliding frame in the present application;

[0027] Figure 9 is a partial sectional view of the sliding frame in the present application;

[0028] Figure 10 is a schematic diagram of the internal structure of the spray tank in the present application;

[0029] Figure 11 is a schematic diagram of the smoke exhaust assembly in the present application;

[0030] Figure 12 is a schematic diagram of the partition plate in the present application.

[0031] In the figure: 1, box body; 2, smoke inlet pipe; 3, backwater pipe; 4, water inlet pipe; 5, smoke outlet pipe; 6, spray tank; 7, second connecting pipe; 8, first motor; 9, smoke exhaust box; 10, water pump; 11, cleaning roller; 12, heat exchange shell; 13, fixed frame; 14, rack; 15, guide rod; 16, fixed clamping plate; 17, sliding frame; 18, first connecting pipe; 19, lead screw; 20, concave-convex plate; 21, sliding rod; 22, connecting shaft; 23, gear; 24, sliding shaft; 25, rotating piece; 26, spring; 27, sliding groove; 28, partition plate; 29, spray plate; 30, fan blade; 31, spray hole; 32, filter screen; 33, first water storage cavity; 34, second motor; 35, second water storage cavity. ​​DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0033] As shown in Figures 1-12 A gas boiler flue gas treatment device.

[0034] Embodiment 1: As shown in Figures 1-9 The technical solutions adopted by the present application are as follows: A gas boiler flue gas treatment device, comprising a box body 1 and a heat exchange assembly arranged in the box body 1. One side of the box body 1 is provided with an inlet flue pipe 2, and the other side is provided with an outlet flue pipe 5. Flue gas enters the box body 1 through the inlet flue pipe 2 and then flows out through the outlet flue pipe 5.

[0035] The heat exchange assembly comprises a plurality of heat exchange shells 12, which are arranged at intervals from top to bottom. The adjacent heat exchange shells 12 are communicated through a plurality of first connecting pipes 18. A fixed clamping plate 16 adapted to the first connecting pipe 18 is fixedly installed in the box body 1, and the first connecting pipe 18 is clamped with the fixed clamping plate 16. The heat exchange assembly is installed in the box body 1 by clamping the first connecting pipe 18 into the fixed clamping plate 16. The uppermost heat exchange shell 12 is communicated with a backwater pipe 3, and the lowermost heat exchange shell 12 is communicated with a water inlet pipe 4. The backwater pipe 3 and the water inlet pipe 4 both extend to the outside of the box body 1 and are connected with corresponding equipment. Water enters the lowermost heat exchange shell 12 from the water inlet pipe 4, and then flows through the plurality of heat exchange shells 12 in turn and is discharged from the backwater pipe 3. The flue gas entering the box body 1 heats the water flowing through the heat exchange shells 12. In this embodiment, the heat exchange shells 12 are four, which are arranged at intervals from top to bottom.

[0036] The box body 1 is provided with a cleaning roller 11 for cleaning the heat exchange shells 12. The cleaning roller 11 is arranged in cooperation with the upper end face of the uppermost heat exchange shell 12 and the lower end face of the lowermost heat exchange shell 12 between the adjacent heat exchange shells 12. A sliding frame 17 is movably arranged in the box body 1, and the cleaning roller 11 is installed on the sliding frame 17. Specifically, three guide rods 15 are fixedly installed in the box body 1, and the sliding frame 17 is slidably sleeved on the guide rods 15. A lead screw 19 is rotatably installed in the box body 1, a second motor 34 is fixedly installed in the box body 1, and the output shaft of the second motor 34 is fixedly connected with the lead screw 19 in a same axis. The sliding frame 17 is threadedly connected with the lead screw 19. The three guide rods 15 and the lead screw 19 are respectively distributed at four corners of the sliding frame 17.

[0037] A sliding rod 21 is slidably connected to the sliding frame 17. Sliding grooves 27 are provided on both the upper and lower sides of the sliding frame 17, arranged symmetrically. The upper end of the sliding rod 21 is slidably disposed in the upper sliding groove 27, and the lower end of the sliding rod 21 is slidably disposed in the lower sliding groove 27. A spring 26 is disposed within the sliding groove 27, with one end of the spring 26 connected to the sliding groove 27 and the other end of the spring 26 fixedly connected to the end wall of the sliding groove 27.

[0038] A convex-concave plate 20 is fixedly installed inside the housing 1. The convex-concave plate 20 is arranged along the front-to-back direction and cooperates with the sliding rod 21. The side of the sliding rod 21 that cooperates with the convex-concave plate 20 is arc-shaped. When the sliding frame 17 slides back and forth, the sliding rod 21 moves back and forth. Under the action of the convex-concave plate 20, the sliding rod 21 simultaneously moves back and forth along the slide groove 27.

[0039] One end of the cleaning roller 11 is fixedly connected to a connecting shaft 22, which is rotatably connected to a sliding rod 21. The other end of the cleaning roller 11 is fixedly connected to a sliding shaft 24. A fixed frame 13 is fixed to the sliding frame 17, and the sliding shaft 24 is disposed within the fixed frame 13. A rotating component 25 is rotatably mounted on the side of the sliding frame 17 near the fixed frame 13. The rotating component 25 includes a cylindrical segment and a square segment, which are fixedly connected. The cylindrical segment is rotatably connected to the sliding frame 17. The sliding shaft 24 has a square hole that matches the square segment of the rotating component 25, and the square segment of the rotating component 25 is slidably disposed within the square hole. When the sliding rod 21 moves left and right reciprocally, the cleaning roller 11 moves left and right reciprocally, and the sliding shaft 24 slides along the square segment of the rotating component 25.

[0040] A gear 23 is coaxially fixedly connected to the cylindrical section of the rotating component 25, and a rack 14 is fixedly connected inside the housing 1, with the rack 14 meshing with the gear 23. When the sliding frame 17 moves back and forth, the gear 23 rotates under the action of the rack 14, causing the rotating component 25 to rotate and the cleaning roller 11 to rotate.

[0041] Working principle: Flue gas is conveyed into housing 1 through inlet pipe 2, and then flows out through outlet pipe 5. Cold water is introduced into the heat exchange assembly through inlet pipe 4, and the water flows from bottom to top through multiple heat exchange shells 12 before flowing out through return pipe 3. The flue gas entering housing 1 heats the water in the heat exchange assembly.

[0042] Because the flue gas contains a large number of dust particles, after a period of use, a large number of dust particles will accumulate on the outer surface of the heat exchange shell 12. If it is not cleaned in time, it will affect the heat absorption efficiency of the heat exchange shell 12.

[0043] When cleaning of the heat exchange shell 12 is required, the second motor 34 is started, causing the sliding frame 17 to move forward within the housing 1. As the sliding frame 17 moves forward, the sliding rod 21 and the cleaning roller 11 move forward synchronously. Under the action of the convex and concave plates 20, the sliding rod 21 moves back and forth, thereby causing the cleaning roller 11 to move back and forth, and the sliding shaft 24 slides along the square section. The cleaning roller 11 cleans the outer surface of the heat exchange shell 12 from back to front.

[0044] Simultaneously, under the action of the rack 14, the gear 23 rotates, the rotating component 25 rotates, and the cleaning roller 11 rotates. This causes different parts of the cleaning roller 11 to come into contact with the heat exchange shell 12, which helps to clean the heat exchange shell 12 more thoroughly.

[0045] When the sliding frame 17 moves the front end of the lead screw 19, the second motor 34 rotates in the opposite direction, causing the sliding frame 17 to move to the rear end, and the cleaning roller 11 cleans the outer surface of the heat exchange shell 12 from front to back.

[0046] Example 2: This example is an improvement based on Example 1.

[0047] like Figure 1 , Figure 10 , Figure 11 as well as Figure 12 As shown, the smoke outlet pipe 5 is connected to the spray tank 6, and the upper part of the spray tank 6 is fixedly installed with a smoke exhaust box 9, which is connected to the spray tank 6. The flue gas discharged from the housing 1 enters the spray tank 6 through the smoke outlet pipe 5 and is discharged through the smoke exhaust box 9.

[0048] A smoke extraction assembly is installed inside the smoke extraction box 9. The smoke extraction assembly includes a first motor 8 and fan blades 30. The first motor 8 is fixedly installed on the smoke extraction box 9, and the output shaft of the first motor 8 extends into the smoke extraction box 9 and is fixedly connected to the fan blades 30. When the first motor 8 is started, the fan blades 30 rotate, drawing the smoke from the box 1 into the spray tank 6, and then discharging it through the smoke extraction box 9.

[0049] A spray plate 29 is fixedly installed in the upper part of the spray tank 6. The spray plate 29 is conical with its tip pointing upwards, and its upper end is connected to the exhaust box 9. Multiple spray holes 31 are provided on the spray plate 29. The spray plate 29 and the inner wall of the upper part of the box 1 form a second water storage chamber 35. Water in the second water storage chamber 35 is sprayed out through the spray holes 31 to remove dust and cool the flue gas in the spray tank 6.

[0050] A partition 28 is fixedly installed inside the housing 1, and the partition 28 and the lower inner wall of the housing 1 form a first water storage chamber 33. A water pump 10 is fixedly installed at the bottom of the housing 1. The inlet of the water pump 10 is connected to the first water storage chamber 33, and the outlet of the water pump 10 is connected to a second connecting pipe 7, which is connected to a second water storage chamber 35. A drain outlet is provided on the partition 28, and a filter screen 32 is installed inside the drain outlet. Water entering the spray tank 6 enters the first water storage chamber 33 through the drain outlet, and then enters the second water storage chamber 35 under the action of the water pump 10. This allows for the recycling of water in the second water storage chamber 35, which is beneficial for saving water resources.

[0051] Working principle: The first motor 8 is started, and the fan blades 30 rotate, drawing the flue gas from the housing 1 into the spray tank 6. The flue gas in the spray tank 6 flows upward and, after passing through the spray plate 29, flows into the exhaust box 9 and is discharged. The water pump 10 is started, transporting water from the first water storage chamber 33 to the second water storage chamber 35. The water in the second water storage chamber 35 is sprayed out through the spray holes 31, removing dust and cooling the flue gas in the spray tank 6. Afterward, the water in the spray tank 6 is filtered by the filter screen 32 and flows back into the first water storage chamber 33, realizing the recycling of water in the second water storage chamber 35. The spray plate 29 is conical, which helps to increase the time the flue gas spends passing through the spray plate 29, thus facilitating thorough dust removal and cooling of the flue gas in the spray tank 6.

[0052] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flue gas treatment device for a gas-fired boiler, comprising a housing (1), wherein a flue gas inlet pipe (2) is provided on one side of the housing (1) and a flue gas outlet pipe (5) is provided on the other side, characterized in that: A heat exchange assembly is installed inside the housing (1). One end of the heat exchange assembly is connected to a return water pipe (3), and the other end is connected to a water inlet pipe (4). The heat exchange assembly includes multiple heat exchange shells (12) spaced apart. Adjacent heat exchange shells (12) are connected by a first connecting pipe (18). A cleaning roller (11) for cleaning the heat exchange shells (12) is installed inside the housing (1). A sliding frame (17) is slidably installed inside the housing (1). A sliding rod (21) is elastically installed inside the sliding frame (17). One end of the cleaning roller (11) is connected to the sliding rod (21), and the other end of the cleaning roller (11) is slidably connected to the sliding frame (17). A concave-convex plate (20) is fixedly installed inside the housing (1). The sliding rod (21) and the concave-convex plate (20) cooperate. The sliding frame (17) drives the cleaning roller (11) to move along the front-back direction while the cleaning roller (11) moves back and forth left and right. The cleaning roller (11) is rotatably mounted on the sliding frame (17); a rotating part (25) is rotatably mounted on the sliding frame (17), the cleaning roller (11) and the rotating part (25) are connected in a limited sliding connection, a gear (23) is fixedly mounted on the rotating part (25), and a rack (14) is fixedly mounted inside the housing (1), and the rack (14) meshes with the gear (23); The smoke outlet pipe (5) is connected to a spray tank (6), and a smoke exhaust box (9) is provided on the spray tank (6). The smoke exhaust box (9) is connected to the spray tank (6), and a smoke exhaust component is provided inside the smoke exhaust box (9). The upper part of the spray tank (6) is provided with a spray plate (29), and multiple spray holes (31) are opened on the spray plate (29). The spray plate (29) and the upper inner wall of the spray tank (6) form a second water storage cavity (35). The water in the second water storage cavity (35) is sprayed into the spray tank (6) through the spray plate (29) to remove dust and cool down the flue gas in the spray tank (6). A partition (28) is fixed to the lower part of the spray tank (6). The partition (28) and the lower inner wall of the spray tank (6) form a first water storage cavity (33). A drain outlet is provided on the partition (28).

2. The flue gas treatment device for a gas-fired boiler according to claim 1, characterized in that: The spray tank (6) is fixed with a water pump (10) at the bottom. The first water storage chamber (33) is connected to the water inlet of the water pump (10). The water outlet of the water pump (10) is connected to a second connecting pipe (7). The second connecting pipe (7) is connected to the second water storage chamber (35).

3. The flue gas treatment device for a gas-fired boiler according to claim 1, characterized in that: The smoke exhaust assembly includes a first motor (8) and a fan blade (30). The first motor (8) is fixedly installed on the smoke exhaust box (9). The output shaft of the first motor (8) extends into the smoke exhaust box (9) and is fixedly connected to the fan blade (30).

4. The flue gas treatment device for a gas-fired boiler according to claim 1, characterized in that: A lead screw (19) is rotatably installed inside the housing (1), and a sliding frame (17) is threadedly connected to the lead screw (19). A guide rod (15) is fixedly installed inside the housing (1), and the sliding frame (17) is slidably connected to the guide rod (15).

5. The flue gas treatment device for a gas-fired boiler according to claim 1, characterized in that: The rotating component (25) includes a cylindrical segment and a square segment, which are fixedly connected. The cylindrical segment is rotatably connected to the sliding frame (17), and the cleaning roller (11) is fixedly connected to a sliding shaft (24). The sliding shaft (24) has a square hole that is adapted to the square segment, and the square segment is slidably disposed in the square hole.

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